Repeating-action for grand pianos.



1?. A. WESSEL L, H. A. NICKEL & A.-L. WESSELL.

REPEATING ACTION FOR GRAND PIANOS.

APPLICATION FILED JULY 8, 1909.

Patented Nov. 9, 1909.

UNI

STATES PATNT FFICE.

FERNANDO A. WESSELD, HENRY A. NICKEL, AND ARTHUR L. WESSELL, OF NEWYORK, N. Y., ASSIGNORS TO WESSELL, NICKEL & GROSS, OF NEW YORK, N. Y.

BEPEATING-ACTION FOR GRAND PIANOS.

Specification of Letters Patent.

Patented Nov. 9, 1909.

Application filed July 8, 1909. Serial No. 506,462.

To all whom it may concern:

Be it known that we, FERNANDO A. Wee- SELL, HENRY A. NICKEL, and ARTHURL. VVESSELL, citizens of the United States, and residents of New Yorkcity, Manhattan, county and State of New York, have jointly invented newand useful Improvements in Repeating-Actions for Grand Pianos, of whichthe following is a specification.

This invention relates to an improved repeating action for grand pianosand more particularly to improved means for adj usting the tension ofthe repeating springs.

As the weight of the hammers in a piano action gradually diminishestoward the treble, and as the tension of the repeating springs must beadjusted to conform to the weight of their respective hammers, it is ofimportance that means be provided by which an ample adjustment of thesprings may be efiected and that such means be readily accessible. Byour invention this desirable re sult is obtained in a simple andefficient manner.

In the accompanying drawing: Figure 1 is a side view, partly in section,of a grand piano action embodying our invention; Fig. 2 a plan of therepeating lever and spring; Fig. 3 a longitudinal section on line 33,Fig. 2, and Figs. 4 and 5 are details of the repeating spring, showingits tail bent in different directions.

The action comprises a support 10, jack 11, repeating lever 12, andhammer 13, all as usual. The repeating spring 14, superposed on lever12, is secured at its rear end to support 10 by means of a string 15passing through a rear slot 16 of lever 12. At its forward end spring 14is first bent downward, then coiled around a covered pin 17 thattraverses a front slot 18 of lever 12, and is finally bent upward toform a tail 19 which extends beyond the upper side of such lever. Lever12 is provided back of pin 17 with a boss 20 which is tapped for thereception of a regulating screw 21 bearing against the rear side of tail19. The ordinary adjustment of spring 14 is effected by means of screw21 which, when advanced against tail 19, will increase the tension ofspring 14, while such tension will be reduced by the retraction of thescrew. As the play of the screw in an axial direction is but limited, itis of importance that means be provided for effecting an additionaladjustment of the spring. These means are furnished by the tail 19 whichclears the top of boss 20 and is thus readily accessible after hammer 13has been swung forward on its fulcrum. By bending the tail from itsnormal position 19 forward and into the position indicated by dottedlines 19", (Fig. 4), the tail on being released will swing backward intocontact with screw 21 and thereby diminish the tension of spring 14. Inlike manner the tension of the spring will be increased by bending thetail from its normal position 19 backward, as indicated by dotted lines19, (Fig. 5). After the tail has been deflected either backward orforward, in the manner described, the further delicate adjustment of thespring is effected by the regulating screw, which may be manipulatedwithoutraising the hammer.

"We claim: 1. In a repeating action for grand pianos, a slottedrepeating lever, and a pin traversing the slot of said lever, combinedwith a repeating spring engaging the pin and having a bendable tailwhich extends above said lever, and with a regulating screw tapped intothe lever and operatively engaging the tail.

2. In a repeating action for grand pianos, a slotted repeating leverhaving a boss, a pin traversing the slot of said lever, a repeatingspring engaging the pin and having a bendable tail which extends abovethe lever, and a regulating screw tapped into the boss and operativelyengaging the tail. FERNANDO A. VVESSELL. HENRY A. NICKEL. ARTHUR L.WESSELL. Vitnesses CHAS. Mr'jHLnNrnLs, PH1L11 MENGES.

